NSB-7
System Module
PAMS Technical Documentation
Page 2
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Nokia Mobile Phones Ltd.
Issue 1 06/00
Table of Contents
Page No
Block Diagram..................................................................................................................................... 8
Technical Summary ........................................................................................................................... 9
DC (charger) connector ...............................................................................................................10
Service Connector .........................................................................................................................11
Battery connector .........................................................................................................................11
SIM card connector ......................................................................................................................12
RTC backup battery ......................................................................................................................12
Battery charging ...........................................................................................................................14
Startup Charging ..........................................................................................................................14
Battery Overvoltage Protection ................................................................................................15
Battery Removal During Charging ...........................................................................................16
PWM .................................................................................................................................................16
Battery Identification ..................................................................................................................16
Battery Temperature ....................................................................................................................18
Supply Voltage Regulators .........................................................................................................19
Switched Mode Supply VSIM ....................................................................................................21
Power up with charger ................................................................................................................22
Power Up with the Power Switch (PWRONX) ......................................................................23
Power Up by RTC ...........................................................................................................................24
Power Up by IBI .............................................................................................................................24
Power Down ...................................................................................................................................24
Acting Dead ....................................................................................................................................25
Active Mode ...................................................................................................................................25
Sleep Mode .....................................................................................................................................25
Charging ..........................................................................................................................................26
Watchdog .......................................................................................................................................26